TM 5-3805-298-23-1
0080
Table 1. 70 Parking Brake Switch Diagnostic Codes - Continued.
080
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
3. Using digital multimeter
70-3 Parking Brake Switch
Resistance 5.0 Ohms or Less -
(WP 0174), measure resistance
Proceed to step 4.
Voltage Is Above Normal -
between parking brake limit switch
Continued
Resistance Greater Than 5.0 Ohms -
(WP 0012, Figure 55) terminal NC
Replace parking brake limit switch
and terminal C.
(WP 0278).
Proceed to Test Step 4.
4. While depressing parking brake
Resistance 5.0 Ohms or Less -
limit switch lever, using a digital
Proceed to Test Step 3.
multimeter (WP 0174), measure
Resistance Greater Than 5.0 Ohms -
resistance between parking brake
Replace parking brake limit switch
limit switch (WP 0012, Figure 55)
(WP 0278).
terminal NO and terminal C.
Proceed to Test Step 4.
Test Step 3. Test for Open Lower Cab
Wiring Harness.
1. Connect jumper wire between NO
and NC wire connectors removed
from parking brake limit switch
(WP 0012, Figure 55).
2. Remove left lower cab access
panels (WP 0347).
3. Remove transmission ECM cover
(WP 0266).
4. Disconnect connector C-C13
(WP 0012, Figure 25) from
Transmission ECM J2.
5. Using digital multimeter
Resistance 5.0 Ohms or Less -
(WP 0174), measure resistance
Proceed to step 6.
between connector C-C13
Resistance Greater Than 5.0 Ohms -
(WP 0012, Figure 25) terminal 52
Replace lower cab wiring harness
and terminal 53.
(WP 0291).
Proceed to Test Step 4.
6. Using digital multimeter
Resistance 5.0 Ohms or Less -
(WP 0174), measure resistance
Replace transmission ECM (WP 0266).
between C wire connector
Proceed to Test Step 4.
removed from parking brake limit
Resistance Greater Than 5.0 Ohms -
switch (WP 0012, Figure 55) and
Replace lower cab wiring harness
ground.
(WP 0291).
Proceed to Test Step 4.
Test Step 4. Verify Malfunction Is
Resolved.
1. Ensure all wiring harness
connectors are connected.
2. Install transmission ECM cover
(WP 0266).
0080-3